CONTENTS 1. INTRODUCTION Institutional composition of the market Market model structure 4 2. TRADING PHASES 5

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1 JANUARY 2018

2 CONTENTS 1. INTRODUCTION Institutional composition of the market Market model structure 4 2. TRADING PHASES Start of the session (Opening Auction) Open Market End of the session (Closing Auction) Trading of shares on the fixing system Trading of shares on the block system Special Operations Market Trading hours ORDERS Basic types of orders Conditions of order execution in Open Market Iceberg orders Validity of orders according to the stage of the market in which they are entered Combination of order types ORDER VALIDITY PERIODS ORDER MODIFICATIONS TICK SIZES MARKET MEMBERS EXECUTION CAPABILITY BASIC TRADING RULES Open Market. Basic Trading Rules Auctions. General rules for fixing the auction prices 35 2

3 9. VOLATILITY AUCTIONS AND PRICE RANGES Volatility Auctions Static and dynamic ranges Volatility auctions due to breach of static range Volatility auctions due to breach of dynamic range Extensions of the opening and closing auctions LIQUIDITY PROVIDERS MARKET MAKERS INFORMATION DISSEMINATION 42 3

4 1. INTRODUCTION 1.1. Institutional composition of the market SIBE -SMART is the BME s current trading platform that is able to satisfy the new needs of the markets: quality, security, scalability, maximum capacity and minimum latency. S.I.B. is managed by Sociedad de Bolsas, a limited company that is owned equally by the four Spanish Stock Markets Governing Bodies. The market members can be broker-dealers, brokers and financial institutions. The main difference between these is that brokers may only trade on behalf of third parties, whereas broker-dealers and financial institutions can trade both on behalf of third parties and on their own account. Broker-dealers, dealers and financial institutions are subject to supervision, inspection and monitoring by the CNMV, the Spanish Securities Market Commission, in all issues relating to their operations on shares markets. The CNMV is a state-owned enterprise with its own legal status whose purpose includes the regulation, supervision and inspection of the shares market and the activities of all individuals and legal entities on the same Market model structure This document describes the main strategic lines of the Spanish Market Model, which is an order-driven market, with liquidity providers for certain shares. The market features real time information on its screens and automatic relaying of trading information. Most shares listed on the S.I.B. are part of the Main Trading market, which is an orderdriven continuous market with an opening auction at the session s beginning and a closing auction at the end. There is also a specific type of trading (trading of shares on the fixing system) whereby the listed stocks are auctioned throughout the session, with two periods for allocation of the shares. This facilitates efficient price formation and reduces volatility. 4

5 2. TRADING PHASES 2.1. Start of the session (Opening Auction) The session begins with the Opening Auction, during which the order book is partially visible, in other words, only the equilibrium auction price and the bid and ask volumes tradable at that price, along with the number of corresponding orders for those volumes are shown. If there was no auction price, the best bid and ask prices would be shown, along with the accompanying volumes and number of orders. During this time, orders can be entered, altered and cancelled, but no trades can be executed. All previous days orders remaining in the order book and entered during the Opening Auction participate. This period (for the Main Trading segment) lasts 30 minutes, with a 30-second random end period to prevent prices from being eventually manipulated. After the random end, the allocation period begins, during which the shares included in orders subject to execution at the fixed auction price are traded. During the allocation period, orders cannot be entered, altered or cancelled. On special occasions, the opening auction may be extended (see section 9.5). Once the shares are allocated, members receive information on the total or partial execution of their orders. All non-executed orders in the auction remain on the order book. The market is informed of the opening price, trading volume, and time of each trade. After this the market is open. 5

6 Start of the session (Opening auction) 8:30:00h-9:00:00h 9:00:00h-9:00:30h Opening Auction: Orders can be entered, altered and cancelled but not matched. The order book is not available but the action price and the volumes associated with this price are trasmitted in real time. Random Auctionend: For a 30- second period the auction may be concluded at any moment without prior warning. This is to prevent price 2.2. Open Market During this period, orders can be entered, altered or cancelled, with trading taking place at the price fixed according to the open market s matching rules, generally in accordance with the priority established by price and time of order entry criteria (see section 8.1). Trading hours for main trading are from 9am to 5.30pm. The order book is open and available to all market members. While the market is open, trades are made. However, this period can temporarily be interrupted if a Volatility Auction arises (see section 9) End of the session (Closing Auction) For main trading, the session ends with a 5-minute auction, between 5:30pm and 5:35pm, with the same characteristics as the opening auction and a 30-second random end period. The price resulting from this auction shall be the closing price of the session. If there is no auction price or if fewer than 500 shares are traded during the auction, the closing price shall be the price of the last 500 traded units closest to the weighted average. If two prices have the same difference with respect to this weighted-average price, the price will be the last one executed. If 500 trading 6

7 units have not been traded, the closing price will be the reference price of the session. However, on special occasions the closing auction may be extended (see section 9.5). Closing Auction 9:00:00h-17:30:00h 17:30:00h-17:35:00h 17:35:00h-17:35:30h Open market Auction period: Orders may be entered but trades are not made. The oder book is not available but the auction price and the difference between buy and sell volumes at this price are trasmitted in real time Random auction End: For a 30- second auction may be concluded at any moment without prior warning. The prices of this auction are the closing prices Trading of shares on the fixing system The Fixing System is reserved for certain shares 1, with a system based on auctions. Periodically Sociedad de Bolsas, S.A. publishes, by an Operating Instruction, the shares which compose the Fixing System. Specifically, there are two auctions: - First auction: From the beginning of the Main Trading opening auction (8:30am) until 12:00pm (with a random 30-second end period). - Second auction: From the end of the allocation period of the first auction until 4:00pm (with a random 30-second end period). 1 Periodically Sociedad de Bolsas, S.A. publishes an Operating Instruction with the shares which compose the Fixing System. 7

8 Auctions in this market segment are not extended. Market to limit orders that do not trade in auctions will remain in the order book as limited orders at the resulting auction price. The same information as in the Main Trading auctions is transmitted. During this period, orders can be entered, altered and cancelled. Market members receive information on the auction price and, if available, on associated buy and sell volumes (and number of orders) at that price. If there is no auction price, the best buy and sell prices are shown, along with the accompanying volumes (and number of orders). In this type of trading, the size of the order book is not made public. These auctions are governed by the same price fixing rules generally applied in all auctions (see section 8.2). The price resulting from the second auction shall be the closing price of the session. If there is no auction price or if fewer than 200 shares are traded during the auction, the closing price shall be the price of the last 200 traded units closest to the weighted-average price. If two prices have the same difference with respect to this weighted-average price, the price will be the last one executed. If 200 units have not been traded, the closing price will be the reference price of the session Trading of shares on the block system This system is designed to allow members to apply cross opposite-side orders or carry out trades, provided that they meet the volume requirements established for gaining access to block trading conditions. Only orders valid for the day and coming from a single originator can be entered, considering as such those received from a natural or legal person with the capacity to decide about 8

9 the whole order, groupings are not allowed. All stocks that trade on the S.I.B. can be traded in this system as well. Trading hours for this system are from 9:00am to 5:30pm. However, when a share is in a Volatility Auction, no block orders can be executed. The system will allow trading with the following minimum turnover, according to the Commission Delegated Regulation (EU) 2017/587 of supplementing Regulation (EU) No 600/2014 of the European Parliament and of the Council on markets in financial instruments with regard to regulatory technical standards on transparency requirements for trading venues and investment firms in respect of shares, depositary receipts, exchange-traded funds, certificates and other similar financial instruments and on transaction execution obligations in respect of certain shares on a trading venue or by a systematic internaliser: Average Daily Turnover (ADT) in EUR Minimum Turnover in EUR ADT< ADT < ADT < ADT <1M 1M ADT <5M 5M ADT <25M 25M ADT <50M 50M ADT <100M ADT 100M Special Operations Market This is a market for operations that must fulfil certain cash and price requirements. The special operations market is open from 5:40pm to 8:00pm. Operations involving the exercise or expiration of futures and options contracts are also entered on this market. 9

10 2.7. Trading hours The following diagram shows full trading hours at present. TRADING TIMETABLE Opening auction Open Market Closing auction GENERAL TRADING 8:30h 9:00h 17:30h 17:35h FIXING Opening auction Closing auction BLOCK TRADING/SPECIAL OPERATIONS: For all stocks 8:30h 12:00h 16:00h Block trading All auction have a random end of 30 sds Special operations 9:00h 17:30h 17:40h 20:00h 3. ORDERS 3.1. Basic types of orders Market orders: are orders entered without a specific price limit and which are traded at the best opposite-side price at the time of entry. If the order is not fully executed against the first opposite-side order, it will continue to be executed at as many opposite-side prices as are necessary until it is completed. In case of being in an auction, the order will remain positioned to the best price respecting the time priority of orders. These orders can be introduced both in auctions and on the open market. If a market order is not traded during the auction, it remains in the book as a market order. If no opposite-side price exists for a market order this is placed on the order book awaiting counterparty. 10

11 Market to limit orders: are orders without a price which are limited to the best opposite-side price on the order book. If the share is on the open market and there is no order on the opposite side of the order book, the order is rejected. These orders can be introduced during auctions as well. If the market to limit order is not executed or is not fully executed at the end of an auction, it will be limited to the auction price. If the value did not set a price in the auction, the orders would be rejected. If a market to limit order is introduced when there are only market orders in the opposite side, they will trade at the price of the last trade. If the stock has not traded that session or if this price is outside the static range, the order will take the static price. Market to limit orders cannot activate volatility auctions (see section9). Both market and market to limit orders have priority over limit orders. Limit orders are orders to be executed at their limit price or better. Buy orders are executed at this price or at a lower price on the opposite side of the order book. Sell orders are executed at the limit price or at a higher price on the opposite side of the order book. These orders allow: - The wish to trade up to/ from a certain price to be expressed. - The execution of an order against existing market orders at a price no lower than the limit price with the rest being left on the market at the limit price. These orders can be entered both on the open market and during auctions. Limit orders are executed at the best opposite-side price on the order book (as long as this price is equal to or better than the price of the limit order being entered). Once on 11

12 the order book, the limit order is always executed at its limit price (unless it is included in an auction and the auction price is better than the limit price). It is not permitted to introduce orders with prices that are above the upper limit of the static range for buy orders, or below the lower limit of the static range for sell orders. On the other hand, it is allowed to introduce orders with prices that are below the lower limit of the static range for buy orders, or above the upper limit of the static range for sell orders. Hidden orders: are large in scale orders 2 not visible for the rest of the market (except in auction) although they are partially executed. After a partial execution, the remaining amount will not be cancelled even if it does not reach the large in scale size. They are traded at their limit price or at a better price, according to the price-visibilitytime priority. At the same price, visible orders have priority. These orders can be entered in the open market, including the auction periods, but not in the fixing system. They can cause volatility auctions. During the auction periods they participate with all their volume and, where appropriate, they will be executed at the price resulting from the auction. Examples of the functioning of the hidden orders: Example 1: We have a market situation with this order book for a value whose average daily turnover is between one and five million euros (minimum turnover = 200,000): HIDDEN VOL. HIDDEN VOL. 18, , A buy hidden order of 15,600 shares at is entered. 100 shares are traded at 18 and 500 shares at and the order book is as follows: 2 They must accomplish the turnover established in section 2.5 for the block system. 12

13 HIDDEN VOL. HIDDEN VOL ,20 A sell limit order of 3,000 shares at is entered. 3,000 shares are traded at and the order book is as follows: HIDDEN VOL. HIDDEN VOL ,20 A sell limit order of 2,000 shares at is entered. 2,000 shares are traded at and the rest of the volume in the buy side is not shown although its turnover is below the large in scale threshold ( 200,000): HIDDEN VOL. HIDDEN VOL ,20 A sell limit order of 10,200 shares at 18 is entered. 10,000 shares are traded at and the other 200 shares remain in the order book. HIDDEN VOL. HIDDEN VOL. 18, Example 2: We have a market situation with this order book for a value whose average daily turnover is lower than 50,000 (minimum turnover = 15,000): HIDDEN VOL. HIDDEN VOL ,00 12, ,90 12, , In the order book there are two sales at 12.50, a limit order and a hidden order. They maintain price-visibility-time priority. A buy market order of 10,000 shares is entered. 3,500 shares are traded at 12.50, the hidden 2,500 shares at and 3,000 at and the order book is as follows: 13

14 HIDDEN VOL. HIDDEN VOL OM , ,90 Midpoint orders: They are orders that allow operations to be executed at the midprice 3 of the best bid or ask position at any time in the order book. If the order is not executed immediately when entering the market, and as long as it is not canceled, it will adjust its price to the midpoint reference price of each moment. If it is not negotiated during the session, the order or the remaining not traded volume will be automatically deleted. If there is no spread, they can be entered but they will not be negotiated. There is the option to flag an execution limit price and indicate the minimum volume of each partial execution (Minimum Executable Size, hereinafter MES) and the minimum volume 4 for the first execution of the order (MAQ), (even in different trades). If the remaining volume of the order is lower than the MES, the order will be canceled. For this reason, MAQ must always be equal to or greater than MES. Minimum amount allowed for this kind of order will be published in an Operating Instruction. Midpoint orders will be traded outside the principal order book, and may not interact with other orders that are in the aforementioned order book. They will only be traded amongst them. Priority in these new orders will be set according to volume-time characteristics. Orders will higher live volume will have better priority, and in case the volume is the same, to the oldest order will have better priority. They can be introduced in the open market, but not in the auction periods or in the fixing system. They do not trigger volatility auctions. They enter the Double Volume Cap (DVC 5 ), so orders will not be accepted if 3 If necessary, the rounding will be upwards, taking into account the tick size of each share. 4 This minimum volume does not make that the order is cancelled if at the time it is entered that minimum amount is not traded, but the order will be entered and it will wait until the minimum volume can be traded. 5 The volume cap mechanism is regulated in article 5 of Regulation (EU) 600/2014 of the European parliament and of the Council of 15 May 2014, on markets in financial instruments and amending Regulation (EU) No 648/

15 the value has the "DVC exceeded" flag marked and the existing ones will be cancelled. The trades done this way will be part of volume and price statistics of the market. Examples of the functioning of the midpoint orders: Example 1: We have a market situation with this order book: ,00 18, A buy midpoint order of 2,000 shares is entered, with a minimum volume of 300 shares and a MES of 200 shares is entered. It is shown below in another order book: ,00 18, A buy midpoint order of 1,500 shares is introduced, with a minimum volume of 300 shares and a MES of 200 shares ,00 18, A sell midpoint order of 1,000 shares is introduced, with a minimum volume of 200 shares and a MES of 100 shares. 15

16 1,000 shares are traded at (midpoint between 17 and 18, without any rounding because the tick size for this value is 0.01) against the buy midpoint order of 2,000 shares, so that now the order of 1,500 shares has the priority as it has a higher live volume ,00 18, A sell midpoint order of 1,400 shares is entered, a minimum volume of 200 shares and a MES of 100 shares. 1,400 shares are traded at and the remaining 100 shares (of the 1,500 shares midpoint order) are cancelled because its MES is 200 shares ,00 18, A sell midpoint order of 1,200 shares, a minimum volume of 300 shares and a MES of 300 shares is entered. 1,000 shares are traded at and the remaining 200 shares are automatically cancelled ,00 18,

17 Example 2: We have a market situation with the following order book: ,00 12, ,90 12, A sell midpoint order of 450 shares is entered, with a minimum volume of 300 shares and a MES of 200 shares ,00 12, ,90 12, A buy midpoint order of 1,000 shares is entered, with a minimum volume of 400 shares and a MES of 200 shares. 450 shares are traded at 12.30, which is the midpoint price rounded upwards because the tick size of this value is 0, ,00 12, ,90 12, Example 3: We have a market situation with the following order book: 17

18 ,00 12, ,90 12, The buy orders are in red because prices are out of the static range spread. A sell midpoint order of 450 shares, a minimum volume of 300 shares and a MES of 200 shares is entered ,00 12, ,90 12, A buy midpoint order of 1,000 shares is entered, with a minimum volume of 400 shares and a MES of 200 shares. As there is no spread because the prices in the buy side are out of the static range spread, there will be no trading (although the resulting midpoint price would be inside the spread) ,00 12, ,90 12, Combined blocks orders: They are large in scale orders with a visible part and another one no-visible. The visible part works as an iceberg order with two volumes on it called "Volume to show" and "Volume to show high". These characteristics allow setting the introduced order with a random number between these two volumes, which will be executed at its limit price or better. This part always has priority over the non- 18

19 visible part at the same price. On the other hand, while the non-visible part (except in auctions) is large in scale 6, it can be directly executed at the midprice 7 with the hidden part of other orders of the same kind in the order book if the second price 8 set in the order. When the non-visible part is lower than the minimum volume of LIS orders, it can only be executed in the visible order book according to the iceberg orders rules. The executions in the non-visible part are made according to the price-time priority that will be determined by the visible part of the order. These orders can be entered in the open market, including auction periods. They cannot be entered in the fixing system. The visible part can trigger auctions and these orders participate with their total volume. These trades will contribute to volume and price market statistics. Examples of the functioning of the combined blocks orders: Example 1: We have a market situation with the following order book for a value whose Average Daily Turnover (ADT) is between one and five million euros (minimum turnover = 200,000) HIDDEN VOL. HIDDEN VOL ,00 17, A buy combined blocks order of 15,600 shares at 16 is entered. Its second limit price is 16.50, 250 shares are shown and 300 shares of volume to show high. HIDDEN VOL. HIDDEN VOL ,00 17, It accomplishes the minimum volume shown in section If necessary, the rounding will be done upwards, always taking into account the tick size of each value. 8 This second price limit is not used for price formation, but serves as the upper or lower limit for the execution of the order. It must be "worse" than the normal limit price (higher for buy orders and lower for sell orders), otherwise the system will not allow its introduction. 19

20 A sell combined blocks order of 15,250 shares at 17 with second price limit is entered, with 250 shares of shown volume and 300 shares of high shown volume. 15,000 shares are traded at without being shown in the order book (since it is the midpoint of the spread 16-17) and the order book results as follows: HIDDEN VOL. HIDDEN VOL ,00 17, A sell limit order of 350 shares at 16 is entered. 350 shares are traded at 16 and a random volume of 276 shares is shown (between 250 and 300). HIDDEN VOL. HIDDEN VOL ,00 17, A sell limit order of 350 shares at 16 is entered. 350 shares are traded at 16. HIDDEN VOL. HIDDEN VOL. 17, Example 2: We have a market situation with the following order book for a value whose ADT is higher than 100 million euros (minimum turnover = 650,000) HIDDEN VOL. HIDDEN VOL ,00 12, A buy combined blocks order of 1,000,000 shares at 11,8 with second price limit 12 is entered with 1,000 shares are set in shown volume and 1,500 shares in high shown volume. HIDDEN VOL. HIDDEN VOL ,00 12, ,80 A sell market order of 2,000 shares is entered. 1,000 shares are traded at 12 and 1,000 20

21 shares at 11.8 and a random volume unit of 1,320 shares is shown (between 1,000 and 1,500). HIDDEN VOL. HIDDEN VOL ,80 12, A sell combined blocks order of 200,000 shares at 11,8 is entered with second price limit 11.5, 500 shares of shown volume and 1,500 shares of volume shown high. That order is fully traded at HIDDEN VOL. HIDDEN VOL ,80 12, A sell market order of 820 shares is entered. It is fully traded and another random volume unit of 1,248 shares is shown (between 1,000 and 1,500) HIDDEN VOL. HIDDEN VOL ,80 12, A sell combined blocks order of 800,000 shares at 12 is introduced with second price limit 11.8, 1,500 shares of shown volume and 2,000 shares of high shown volume. The hidden part of the buy order is traded at 11.9: HIDDEN VOL. HIDDEN VOL ,80 12, , VWAP: transactions previously agreed by the market members at the weighted average price in the time interval used as reference and for a volume equal or lower than those that the market member has executed during the session in the same value. These orders can be entered as special operations in the open market and up to 15 minutes after the publication of the closing price. The market member shall inform the Trading and Control Committee of the weighted average price and the time interval considered so that the transaction can be verified and accepted. They cannot be entered in the fixing system. These traded so now contribute to price market statistics. 21

22 3.2. Conditions of order execution in Open Market. Limit, market to limit and market orders can have the following execution conditions: Immediate or Cancel: this order is executed immediately for the amount possible and the system rejects the rest of the order volume. Minimum volume: this order, when entered on the market, should execute a specified minimum volume. If this minimum amount is not executed, the order is rejected by the system. Fill or Kill: this order should be fully executed when entered or be rejected before it is traded. This is a special type of minimum volume order for which this minimum volume is equal to the total volume of the order. These are immediate execution conditions and cannot be entered at auctions. Orders with Immediate or Cancel and Fill or Kill conditions cannot activate volatility auctions and will be rejected by the system in such a case. Minimum volume orders can activate volatility auctions if the minimum volume established in the order has been executed before the trigger price at which trading is interrupted due to volatility has been reached Iceberg orders These orders allow market participants to enter orders without revealing the full volume to the market. This possibility is especially interesting for large orders, being the minimum volume 10,000euros. In this way traders can avoid adverse price movements. When the order is entered, the trader must display part of the order volume (displayed volume) which will be a minimum of 250 shares. This displayed volume is included in the order book with the time of entry. 22

23 The entry of new displayed volumes of an iceberg order only has priority in terms of price and not in terms of time of entry. Once the displayed volume has been traded, another unit of volume will be displayed. It will have a random volume inside the interval Displayed volume - High displayed volume if the High displayed volume is informed. (see example) If there are a number of different iceberg orders on a share s order book, the displayed volumes are entered on the order book in accordance with price-time of entry priority. In addition, it is important to point out that iceberg orders take part in auctions at their total volume. Iceberg orders can have the execution condition Minimum Volume and can be limit orders, market orders, market to limit orders or combined blocks orders. Example showing how the iceberg order works. In our example, the order book is as follows: HIDDEN VOL. HIDDEN VOL ,00 12, ,90 12, There is an iceberg sell order of 4,250 shares for which the displayed volume has been fixed at 250 shares when entered and the high displayed volume at 500 shares. This takes first place in the order book because of its time of entry priority (in other words, it was entered before the existing sell order for 100 shares at 12.5). If prices are equal, the order entered previously takes first place. A buy order of 200 shares at 12.5 is entered and traded against the shown volume of the iceberg order at HIDDEN VOL. HIDDEN VOL ,00 12, ,90 12, Only 50 shares are shown because no more shares are displayed until the whole of the displayed volume has been traded (no other displayed volume unit will appear on the market). 23

24 A buy order of 100 shares at 12.5 is entered. 50 shares are matched at 12.5 from the visible part of the iceberg order and 50 shares are traded at 12.5 from the limit order below. HIDDEN VOL. HIDDEN VOL ,00 12, ,90 12, A further 300 shares have been displayed (new random volume unit between 250 and 500 shares), with only 3,700 remaining hidden, however, the order has lost its time of entry priority Validity of orders according to the stage of the market in which they are entered trading phase. The following table shows the orders that can be entered in the market depending on the OPEN MARKET VOLATILITY AUCTION OPENING AUCTION CLOSING AUCTION TYPES OF ORDERS Market order YES YES YES YES Market to limit order YES YES YES YES Limit order YES YES YES YES Hidden order YES YES YES YES Midpoint order YES NO 9 NO NO Combined blocksorder YES YES YES YES VWAP order YES YES NO YES EXECUTION CONDITIONS Execute or Eliminate YES NO NO NO Minimum Volume YES NO NO NO Fill or Kill YES NO NO NO Iceberg orders YES YES YES YES 9 They cannot be entered in the volatility auctions, but if they were already introduced before the auction they are not canceled. 24

25 3.5. Combination of order types can be entered: The following table shows the possible combinations of the different types of order which MO MTLO LO HO MPO VDO VWAP EE MV FK IO Market order (MO) - NO NO NO NO NO NO YES YES YES YES Market to limit order (MTLO) NO - NO NO NO NO NO YES YES YES YES Limit order (OL) NO NO - NO NO NO NO YES YES YES YES Hidden order (HO) NO NO NO - NO NO NO NO NO NO NO Midpoint order (MPO) NO NO NO NO - NO NO NO NO 10 NO NO Combined blocksorder (VDO) NO NO NO NO NO - NO NO NO NO YES VWAP order NO NO NO NO NO NO - NO NO NO NO Execute or Eliminate (EE) YES YES YES NO NO NO NO - NO NO NO Minimum Volume (MV) YES YES YES NO NO NO NO NO - NO YES Fill or Kill (FK) YES YES YES NO NO NO NO NO NO - NO Iceberg orders (IO) YES YES YES NO NO SÍ NO NO YES NO - 4. ORDER VALIDITY PERIODS Orders may be valid for the following periods of time: Valid for one day: these orders are valid until the end of the session in progress. If not excuted during the session the order or that part of it which has not been executed is automatically eliminated. Valid until a specific date: the operator enters a specific date for these orders (at most 90 calendar days ). At the close of the session on the date entered by the operator the order or that part of it which has not been executed is automatically eliminated. 10 The minimum volume in MPO is not considered as a condition of execution, as it is explained in note 3. 25

26 Valid until cancelled: these orders are valid for 90 calendar days after which the order or that part of it which has not been executed is automatically eliminated. Orders with a validity of more than one day maintain their priority in the System in accordance with their price and time of entry with respect to orders generated during the course of the session. Midpoint orders are valid just for the day. 5. ORDERS MODIFICATION When an order is introduced, the system will assign it a number of order, which remains invariable during the whole life of the order. To every order modification a new number of history will be generated (consecutively to be able to follow the evolution of the order). If the modification of an order has an impact on its priority, a new number of priority will be generated. 6. TICK SIZES According to Commission Delegated Regulation 2017/588 of , supplementing Directive 2014/65/EU of the European Parliament and of the Council with regard to regulatory technical standards on the tick size regime for shares, depositary receipts and exchange traded funds, trading is carried out with the following tick sizes, being the minimum price for a given stock 0.01 euros. Trading venues shall apply to orders in shares or depositary receipts a tick size which is equal to or greater than the one corresponding to: (a) the liquidity band corresponding to the range of average daily number of transactions for that instrument; and (b) the price range in that liquidity band corresponding to the price of the order. 26

27 For the fixing system the first liquidity band, corresponding to an ADNT between 0 and 10 in the table above will apply. 7. MARKET MEMBERS EXECUTION CAPABILITY The orders can be entered by the market member or participant of the trading venue negotiating on its own account (DEAL) or in another quality (AOTC). In addition, they can be entered within the framework of a market making strategy or as liquidity providers, based on the contract subscribed by the members and with a specific indicator (flag) in the order. 27

28 8. BASIC TRADING RULES 8.1. Open Market. Basic Trading Rules Several basic criteria govern open market trading: Price-time priority of orders: orders with the best price (highest buy and lowest sell) have priority in the book. When prices are the same, those orders entered first have priority. Best opposite side price: orders entered on the system are executed at the best opposite side price. In other words, a buy order which can be executed will be executed at the price/s of the first order/s on the sell side of the order book. Equally, a sell order entered in the system which can be executed at that moment will be executed at the price/s of the first order/s on the buy side of the order book. In addition, according to section 3.1. there are some types of orders in which priority is also marked by visibility and live volume. Orders may be fully executed (in one or several executions), partly executed or not executed. Accordingly, each new order can generate several trades. (trades made): We outline below the specific open market trading rules and examples of their application Rule 1. If an order (limit order, market order, hidden order or the visible part of a combined blocksorder) is entered in the system and finds an opposite-side limit order, the order which is in the book determines the trading price. The non-executed part is executed at the price of the next 28

29 limit order. Rule 2. If a market order is entered and on the opposite side there are only market orders, the trade will take place at the price of the last execution. If there is no last price or this is outside the static price range the last price will be the static price. market order. If the order is not fully executed, the non-executed part will be placed in the book as a Example 1: The diagram shows the state of the book and the characteristics of an order which has been entered. Last Price: OM MARKET ORDER FOR 500 SECURITIES In this case, 500 shares are traded at a price of , and the resulting order book is: 500 OM Example 2: The diagram shows the state of the order book and the characteristics of an order which has been entered 29

30 Last Price: OM MARKET ORDER FOR 1500 SECURITIES 1,000 shares are traded at a price of , and the order book is as follows: 500 OM Rule 3. -If a market order is entered and on the opposite side of the book there are market and limit orders, the trade will take place at the last price or at the best limit order price. Example 1: The diagram shows the state of the order book and the characteristics of an order which has been entered. Last Price: OM ,00 MARKET ORDER FOR SECURITIES ,00 In this example, the following trades are made: -1,000 shares at shares at shares at

31 And the order book after the trades would be: ,00 If a limit order is entered and on the other side of the book there are only market orders the trade will take place at the last price or at the limit order price if this is better. Example 2: The diagram shows the state of the order book and the characteristics of an order which has been entered. Last Price 100, OM LIMIT ORDER FOR 100 SECURITIES AT 99, shares are executed at , and the order book will then be as follows: 900 OM Example 3: 31

32 The diagram shows the state of the order book and the characteristics of an order which has been entered. Last Price 100, OM LIMIT ORDER FOR 100 SECURITIES AT 103, shares are executed at , and the order book will then be as follows: 900 OM - If a limit order is entered and on the other side of the book there are market and limit orders the trade will take place at the last price or at the best limit order price for the volume available at this price. The rest will be traded at the next best price. Example 4: The diagram shows the state of the order book and the characteristics of an order which has been entered. Last Price 100, OM LIMIT ORDER FOR ,00 SECURITIES AT 99, ,00 32

33 In this example, the following trades are made: And the order book is as follows: -1,000 shares at shares at shares at ,00 Example 4.B The diagram shows the state of the order book and the characteristics of an order which has been entered. Last Price 100, OM LIMIT ORDER FOR ,00 SECURITIES AT 99, ,00 In this example, the following trades are made: -1,000 shares at shares at And the order book is as follows: ,00 99,

34 In the three cases envisaged by rule 3, if there is no last executed price or this is outside the range of static range prices, the last price shall be the static price. Rule 4: - If a market to limit order is introduced and on the other side of the book there are market and limit orders, the introduced order will take either the price of the best opposite-side limit order, or the last traded price, whichever is better. Example 1: The diagram shows the state of the order book and the characteristics of an order which has been entered. Last Price 100, OM MARKET TO LIMIT ORDER FOR , SECURITIES ,00 In this example, the following trades are made: -1,000 shares at shares at And the order book is as follows: ,00 101,

35 Rule 5: All the above rules apply in the same way for hidden orders instead of limit orders Auctions. General rules for fixing the auction price There are four rules for fixing the auction price: 1) The price at which the largest volume of shares is executed. 2) If there are two or more prices at which the same number of shares can be executed, the auction price shall be that which leaves the smallest surplus. The surplus is the difference between bid and ask volumes susceptible of being negotiated at the same price. 3) If the two conditions stipulated above are the same, the price of the side with the larger volume (larger weight) shall be taken. 4) If the three conditions stipulated above are the same, the price which is closest to the last executed price shall be taken. If this price is within the range of potential auction prices (upper and lower limit), the last executed price is taken. If there is no last executed price or this is outside the range of static range prices, the price shall be the last static price (see section on Volatility Auctions and Price Ranges). 9. VOLATILITY AUCTIONS AND PRICE RANGES 9.1. Volatility Auctions Volatility Auctions last five minutes, plus a 30-second random end, during which the auction may close at any moment without prior warning and the shares allocation process begins (trades made at the resulting auction price). It should be stressed that Volatility Auctions are never 35

36 extended; the only auctions that may be extended are opening and closing auctions. It is however possible for a share to remain under auction once the Volatility Auction is over (i.e. if the Opening Auction has been extended). This is the case if, at the time of the allocation and following the five minutes auction and random end, market conditions are such that the volume of market orders, plus market to limit orders, is higher than the volume of oppositeside orders which may be allocated. In such situations, the system does not carry out the share allocation and, in these exceptional cases, the share remains under auction, leaving the allocation decision in the hands of the Trading and Control Committee, which (via the Supervision Department) will make the decision to go ahead with the allocation, provided that the situation is corrected. If the closing auction is extended, the system will carry out the allocation process automatically after the close of the two-minute extension period. Volatility Auctions take place when the price at which a value is about to be negotiated is in the limit of the static or the dynamic price range Static and dynamic ranges Static and dynamic ranges are calculated on the basis of the most recent historical volatility of each share. Each share has a unique static and dynamic range, reflecting its specific characteristics and in line with its most recent performance. These ranges are publicly available and are updated on a regular basis in Operating Instructions from Sociedad de Bolsas, so that they accurately reflect the characteristics of the share at any given moment. Static ranges: The static range defines the maximum permitted variation around the static price (in either direction) and is expressed as a percentage. The static price is the price fixed at the last auction (the auction allocation price) 11. The static range remains in force throughout the entire session. 11 The static price at 8.30 a m. is the reference price 36

37 Dynamic ranges: The dynamic range defines the maximum permitted variation around the dynamic price (in either direction) and is expressed as a percentage. The dynamic price is the price fixed in the last trade, and may be the result either of an auction (in which case it will be the same as the static price) or of a trade made on the open market. The dynamic ranges remain in force only while the market is open and during the closing auction, so they do not apply in the fixing system. However, although standard market practice will be to apply these ranges, in exceptional circumstances the Trading and Control Committee may adjust the range set for a certain share or segment, or, where applicable and when prevailing market conditions so require, for the whole of the market. It should be noted that dynamic ranges are, by definition, less than or equal to static ranges Volatility auctions due to breach of static range Volatility Auctions due to breaches of the static range are triggered when a stock tries to negotiate either at the upper or lower limit of the static price range (maximum variation in either direction in the static price). For example, see the following Chart, showing movement in the share in question throughout most of the session. This chart plots both trading prices on the open market and the (non-traded) indicative price during auction. The static range of this share is 5%. As the chart shows, a Volatility Auction is triggered when the price reaches a level (static price +5%) which causes an upswing in volatility. It should be noted that during this auction period, the static price is the trigger price of the auction, because if it was not this way, the share could not continue fluctuating in the breaking point direction (on the upside). In the example given here, movement during the Volatility Auction is as follows: during the five minutes of the auction, the trigger price was perceived to be too high by all market participants, since in the Volatility Auction shares were allocated at a lower price. This new static price, which is higher than the previous 37

38 one, causes a movement toward the top end of the static limits. 15,5 15,25 15 Chart 1: VOLATILITY AUCTION DUE TO BREACH OF STATIC RANGE PRICE TRIGGERING THE AUCTION (NO TRADE AT THIS PRICE) 14,75 14,5 P R I C E 14, ,75 13,5 13, ,75 12,5 OP. AUCTION OPEN MARKET VOLATILITY AUCTION OPEN MARKET 12,25 8:30:00 9:12:46 10:30:03 10:44:28 11:26:25 11:46:55 11:57:28 12:49:01 12:49:25 12:52:19 12:54:44 14:41:47 15:18:16 TIME Source: Sociedad de Bolsas, S.A. PRICE MAX. STATIC LIMIT MIN. STATIC LIMIT 9.4. Volatility auctions due to breach of dynamic range Volatility Auctions due to breaches of the dynamic range are triggered when a stock tries to negotiate either at or out the upper or lower limit of the dynamic price range (maximum variation in the dynamic price in either direction). As an example of a Volatility Auction triggered by a breach of the dynamic range, the following Chart plots the performance of a share (using real data) in the first hour and mid way through the trading session. This chart plots both trading prices on the open market and (nontraded) auction prices. The static range of the share is 6% and the dynamic range 3.5%. The 12 The dynamic price is the last price traded at any given moment (whether resulting from an allocation carried out in an auction, or simply, resulting from the last trade). 38

39 trigger price initiating the Volatility Auction due to breach of the dynamic range was, in fact, a price at which the market was going to trade. Therefore, trading continued until the price of the share threatened to breach the dynamic price range on the downside (dynamic price -3.5%). In this case, during the five minutes of the auction, the trigger price was perceived as too low by all market participants and was corrected in the auction, when the shares were allocated at a higher price. This new static price is lower than the previous one, what causes a movement toward the lower end of the static limits. 9 Chart 2: VOLA TILITY AU CTION D UE TO BR EACH OF DYNAMIC RA NGE 8,75 INDICATES DY NAM IC RANG E A N ORDER CAUSES A S W EEP OF THE MA RKET 8,5 P R I C E 8,25 8 7,75 7,5 PRICE TRIGG ERING T HE AUCTION (THE RE IS NO TRA DE AT THIS PRICE) OP E NING AUCT IO N OPEN M ARKET V O LATILITY AUCTION O P EN M ARKE T 7,25 8:3 0:00 8:39:41 9:01:59 9:06:19 9 :10:15 9:18:33 9:30:00 9:41:3 4 9:44:10 9:45:25 9:47:54 9:50 :24 9:53:33 9:56:03 9:59:54 TI ME PRICE MA X. STA TIC L IMIT M IN. S T AT IC LIMIT S our ce: Sociedad de B olsas, S.A Extensions of the opening and closing auctions Both the opening and closing auctions may be extended. These extensions last for two minutes plus a 30-second random end period. As mentioned above, Volatility Auctions are never extended. Before detailing how and why auction extensions come about, we propose to look at a potential scenario in which, due to a breach of either the static or dynamic range a Volatility Auction is triggered less than five minutes before the start of a closing auction. In such cases, the 39

40 Volatility Auction overlaps with the general closing auction. If the price resulting from the opening auction is on the limits of the static range, the opening auction for the share in question is extended (by two minutes plus the random end). If the price resulting from the closing auction is on the limits of the static range, or on the limits of or outside the dynamic range, the closing auction for the share in question is extended (by two minutes plus the random end). Extensions to closing auctions always end with an allocation, regardless of whether market conditions are such that the volume of market orders, plus market to limit orders, is higher than the volume of opposite-side orders that may be allocated. However, if such conditions arise during an extension to an opening auction, the share remains under auction, leaving the allocation decision in the hands of the Trading and Control Committee, which (via the Supervision Department) will make the decision to go ahead with the allocation, provided that the situation is corrected. 10. LIQUIDITY PROVIDERS Market members who have registered liquidity commitments with the issuers of shares traded in the market or with the market itself according to regulation established in this respect, will be considered liquidity providers. They will have to comply with certain market parameters (mainly spread and volume parameters) and requirements at all time. These parameters will differ depending on whether the most relevant market in terms of liquidity for the share is open or closed. The Trading and Control Committee is responsible for ensuring that liquidity providers comply with the commitments assumed at all times. 13 Remember that the dynamic range also applies in the closing auction. 40